Guess what! The Vulgate Bible is online. You might have known this already, but I'm always looking for primary sources to illuminate.
Edward Burne-Jones' illustrations of the works of Geoffery Chaucer
The Crusader Bible in excellent, zoom-in-able resolution
The Book of Kells, again in excellent, zoom-in-able resolution.
More to follow, I'm just really excited about what the Internet just has for the taking. Thank you to all digitizers, all archivists, and all librarians who direct me to sites like these.